package wensheng.stu.filter;


import com.alibaba.druid.support.json.JSONUtils;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;
import wensheng.stu.common.BaseContext;
import wensheng.stu.common.R;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request  = (HttpServletRequest)servletRequest;
        HttpServletResponse response = (HttpServletResponse)servletResponse;

        log.info("拦截到请求","{}",request.getRequestURI());
        String requestURI = request.getRequestURI();


        String[] a = {
            "/employee/login",
            "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"
        };

        boolean check = check(a, requestURI);
        if (check){
            log.info("拦截到请求不需要处理");
            filterChain.doFilter(request,response);
            return;
        }

        //网页端
        if (request.getSession().getAttribute("employee")!=null){
            log.info("用户已经登录,用户id为:{}",request.getSession().getAttribute("employee"));

            Long empId = (Long) request.getSession().getAttribute("employee");

            BaseContext.setCurrentId(empId);

            filterChain.doFilter(request,response);
            return;
        }

        //移动端
        if (request.getSession().getAttribute("user")!=null){
            log.info("用户已经登录,用户id为:{}",request.getSession().getAttribute("user"));

            Long userId = (Long) request.getSession().getAttribute("user");

            BaseContext.setCurrentId(userId);

            filterChain.doFilter(request,response);
            return;
        }

        response.getWriter().write(JSON.toJSONString((R.error("NOTLOGIN"))));
        return;


    }
    public boolean check(String[] urls,String requestURL){

        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURL);
            if (match){
                return true;
            }
        }
        return false;


    }
}



